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Transcription and translation of alfalfa leghemoglobin genes during root nodule development

Transcription and translation of alfalfa leghemoglobin genes during root nodule development

Science in China Series B Chemistry Life Sciences & Earth Sciences 33(9): 1078-1083

LegHb mRNAs isolated from 2 to 10-week old alfalfa nodules are actively translated in vitro to give a full component of legHb products suggesting that legHb genes, once expressed, are not regulated at the transcription level during the lifetime of a nodule. In vitro transition studies with legHb mRNAs from 10-week old nodules indicate that translation of mRNAs is partially inhibited by addition of alfalfa legHb components themselves and is not promoted by addition of myoglobin and hemoglobin as compared with those of alfalfa legHb mRNAs isolated from 4-week old nodules. This intimates that the regulation of alfalfa legHb synthesis in old nodules at the translation level is weakened.

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